Grey Ghost Amphibians VS Grey Ghost Underwaters

[h.m.scoop]

https://youtu.be/agskGzag-3I

 

[frogmaster-rivera]

Amphibian with OBN mod works great. If used for undrwater detection, you need to use a bone phone

 

[Overvoltage]

Frogmaster Do I have some questions for you
What bonephone did you use, the Aquascan Submersible? That is the only one I have found that would be suitable for the diving environment. Obviousely you had to modify the connector if you did. If you had to modify the connector, how did the wires match up (color code)? Do you have any helpful hints on this modification?

What depth have you had the CTX down to now? How has the screen and battery compartment held up to the pressure? How is the buoyancy of the detector at depth? Which coil do prefer to use when diving? I would guess coil selection would be about the same as on land, 6" for tight rocky places, 11" for general hunting, and the 17" for wide open spaces where you might want to cover a lot of ground with minimal targets.

How is the shaft length for diving? I saw where Anderson Shafts is trying to develop a diving shaft for the CTX3030.

Thanks
Paul

 

[frogmaster-rivera]

I've used the one from AMRON and put a CTX M8 connector on it. Work perfectly >95dbi vs GGUW 75dbi and GGAMPHIBIAN 89dbi (tested by OBN on the CTX)

http://www.amronintl.com/amron-international-1406-2-bone-conducting-earphone-with-6-ft-cable-without-connector.html[/url]

 

[Overvoltage]

Frogmaster, You must have been replying while I was editing my response. I have several questions for you that are in the previous post.
Paul

 

[frogmaster-rivera]

Frogmaster Do I have some questions for you
What bonephone did you use, the Aquascan Submersible? That is the only one I have found that would be suitable for the diving environment. Obviousely you had to modify the connector if you did. If you had to modify the connector, how did the wires match up (color code)? Do you have any helpful hints on this modification?

What depth have you had the CTX down to now? How has the screen and battery compartment held up to the pressure? How is the buoyancy of the detector at depth? Which coil do prefer to use when diving? I would guess coil selection would be about the same as on land, 6" for tight rocky places, 11" for general hunting, and the 17" for wide open spaces where you might want to cover a lot of ground with minimal targets.

How is the shaft length for diving? I saw where Anderson Shafts is trying to develop a diving shaft for the CTX3030.

Thanks
Paul

"Everything You Always Wanted to Know About CTX Underwater But Were Afraid to Ask"

1/ For the bone phone, I use the AMRON one and my friend OBN did a video test of it: it is simply brilliant and I won't use an other on underwater. I have the one from Aquascan and it is the same, not sure the speaker inside will feat with CTX in terms of impedance like the AMRON one does. The Aquascan bone phone comes with an IKELITE connector (same crappy plug use by Minelab for the battery pack of the Excalibur, and a few photographic and video underwater housing)

2/ I have track record of -21m with the CTX, but I try to keep it around -5m / -12m most of the time. I had no problem with screen or battery pack. Did had a leak one time but it was my fault, I didn't screwed well the usb port (not the cap) behind the screen and Minelab sent me a new one without any question.

3/ Buyancy is a good question, CTX is a little postive, if you let it on his own, it will slowly surface :

Look at this photo, I don't hold it and my Bone phone cord retains the CTX from surfacing

4/ I only use the 11" coil and it is the ONLY ONE to be use undrwater :

- 17" is too big, you won't be able to swing correctly underwater for a long period of time
- 6" is too small and you have less dirt underwater (I'm talking about seawter with salt) then you have on land. At the end of the day, except aluminium and gold, iron with time disappears....
- Coilteck 10x5, just forget it, you can't detect horizontally with it VS minealb coil. So you need to be at 1m (3Ft) from the ground to detect! A nightmare

=> the one and only coil to use is the stock 11" coil

5/ For underwater usage, you must use the shaft completely retracted, and the length is just perfect.

6/ I apprciate Pete from Anderson Shafts (Pete Anderson) and I'm part of their team. I have all their carbon product for both Excalibur & CZ product and they are really good. Concerning the CTX, to be honest I'm not sure there is something to change, the CTX 3030 fully retracted feat perfectly underwater.

Hope to have answered to your questions

FM

 

[Overvoltage]

FM, Thanks for the response and all are good answers.

I do have one last question in regards to the picture of you detecting with the CTX3030. Is that a pinpointer attached to the side of the CTX? If so which one are you using and how has it worked for you?

I really appreciate you answering my questions. I have been following your quest to use the CTX for diving and I have completed the O-ring modification on mine. I just haven't been able to get any headphones that are loud enough to use diving. I truly believe that the CTX can be the perfect underwater detector once the low volume issue gets worked out.

 

[frogmaster-rivera]

Using the Bone phone from Amron IS THE SOLUTION for underwater detection in combination with CTX 3030. You need to have a diving hood.

The pinpointer is the Xpointer Diver edition from Deteknix. It is still in beta version but will be available shortly in mass production.

Here is a test of it:[video]https://www.youtube.com/watch?v=O0PLhZR_8xI[/video]

I have received 3 beta versions of it, gave one to Aquaman and he even use it on land, and to my other buddy Laurent and he his happy with it

https://www.youtube.com/watch?v=_nRCoXTSzeI

We have planned a few dives on various wrecks all together next next week so we will probably publish a lot of videos with CTX, Excalibur and Xpointer DIver edition (and maybe with other beta detectors if they are ready)

Concerning the o'ring mod, I don't use anymore the one on the USB port, I will publish a part#2 video for this latest mod update.

Now I'm not sure CTX is the best machine underwater. You can't really detect deep (difficult to retrieve the deep targets, waist of time etc...) so Excalibur & CZ-21 are great machines also. The only reason to use the CTX is its screen ID that might save you a bit of precious time.

Hope you have a bit of scuba experience, scuba detecting is not difficult, just that buoyancy handling is very hard at low depth VS deeper depth: try to keep it simple without pinpointer at the beginning and be sure to master your detector perfectly before any dive. Keep an eye on your watch because time is running very fast when scuba detecting!!!

 

[Overvoltage]

I have been using my Garrett Infinium while diving. I have been diving freshwater lakes and there is a lot of iron trash. I know the CTX will be great in this environment. On occasion, I have had some problems finding the targets and feel I waste a lot of air time searching for what is possibly a pulltab. That's when I think the pinpointer would come in handy.

 

[frogmaster-rivera]

I have been using my Garrett Infinium while diving. I have been diving freshwater lakes and there is a lot of iron trash. I know the CTX will be great in this environment. On occasion, I have had some problems finding the targets and feel I waste a lot of air time searching for what is possibly a pulltab. That's when I think the pinpointer would come in handy.

Understood! I have PI Aquapulse from Aquascan ( Eric Foster technology) and only use it to locate traces of wrecks. Honestly it is very hard to use them on areas where you have pollution.

Concerning the buoyancy, I mainly dive in the Med Sea (lot of salt compared to Atlantic Ocean) but I've tried several time in lakes and CTX 3030 is almost neutral with 11" coil. What is cool in freshwater is that you can have a leak, it's no problem VS Saltwater.